Definition
Automatic enrollment is a defined contribution plan design feature that enrolls eligible employees in the plan by default at a specified contribution rate, with the employee retaining the right to opt out or change the rate at any time.
Why it matters
The choice of whether an eligible employee participates in a defined contribution plan has historically been treated as opt-in — the employee elects to enroll, and the default is non-participation. Automatic enrollment inverts the default. The inversion matters because default choices tend to persist, and observed participation rates in automatically enrolled plans are substantially higher than in comparable opt-in plans. Under SECURE 2.0, automatic enrollment is now required for most new defined contribution plans established after December 29, 2022, with limited exceptions.
How it works
An automatic enrollment provision in the plan document specifies the default contribution rate, the default investment vehicle for automatic contributions, the notice provided to employees before contributions begin, and the employee's right to opt out or elect a different rate. Under the eligible automatic contribution arrangement rules of section 414(w) of the Internal Revenue Code, employees can withdraw amounts contributed under automatic enrollment within a limited window after the first contribution without the additional tax on early distributions. Under the qualified automatic contribution arrangement rules of section 401(k)(13), a plan can satisfy the actual deferral percentage nondiscrimination test through a safe harbor tied to a specified automatic enrollment structure. Under SECURE 2.0, new plans covered by the mandate must set the default initial contribution rate at not less than 3 percent and not more than 10 percent, with automatic annual escalation of at least 1 percentage point up to a rate not less than 10 percent and not more than 15 percent.
In practice
For a participant enrolled through automatic enrollment, the practical fact is that contributions have begun at the plan's stated default rate, with the participant's paycheck reduced accordingly and the balance building in the plan's designated default investment. The participant retains the right to change the contribution rate, change the investment allocation, or opt out entirely, but the default persists until a change is made. A professional advising a newly enrolled employee typically reviews whether the default contribution rate captures the full employer match (if higher than the default), whether the default investment is appropriate for the employee's horizon, and whether the employee's overall savings rate across all accounts is adequate to the retirement income target. Plan sponsors administering automatic enrollment provide the required notices, monitor opt-out rates, and integrate the automatic enrollment structure with the plan's overall investment menu and default investment selection.
Related terms
- Automatic escalation
- Qualified default investment alternative
- Eligible automatic contribution arrangement
- Qualified automatic contribution arrangement
- SECURE 2.0 Act
- Actual deferral percentage test
- Default investment
- Participation rate